However, this assumes you really have left it too long. If you're not sure if that's the case, you can do a test with an unimportant piece of film (a film leader, e.g.).

Jim MacKenzie - Regina, Saskatchewan, Canada

A bunch of Nikons; Feds, Zorkis and a Kiev; Pentax 67-II (inherited from my deceased father-in-law); Bronica SQ-A; and a nice Shen Hao 4x5 field camera with 3 decent lenses that needs to be taken outside more. Oh, and as of mid-2012, one of those bodies we don't talk about here.